<div class="row">
  <div class="col-md-2">
    <div class="panel panel-default"> 
      <!-- Default panel contents -->
      <div class="panel-heading">系统管理</div>
      <!-- List group -->
      <ul class="list-group">
        <li class="list-group-item">系统设置</li>
        <li class="list-group-item">栏目管理</li>
      </ul>
      <div class="panel-heading">书籍管理</div>
      <!-- List group -->
      <ul class="list-group">
        <li class="list-group-item">书籍类型</li>
        <li class="list-group-item">书籍列表</li>
      </ul>
    </div>
  </div>
  <div class="col-md-10"> </div>
</div>
